<template>
  <el-container class="home-container">
    <el-header>
      <div>
        <img src="../assets/shop.png" alt="" />
        电商后台管理系统
      </div>
      <el-button type="info" @click="quit">退出</el-button>
    </el-header>
    <el-container>
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-btn" @click="toggleCollapse">|||</div>
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409eff"
          unique-opened
          :collapse="isCollapse"
          :collapse-transition="false"
          :router="true"
          :default-active="activePath"
        >
          <el-submenu
            :index="item.id + ''"
            v-for="item in menuList"
            :key="item.id"
          >
            <template slot="title">
              <i :class="iconList[item.id]"></i>
              <span>{{ item.authName }}</span>
            </template>
            <el-menu-item
              :index=" '/'+subItem.path "
              v-for="subItem in item.children"
              :key="subItem.id"
              @click="saveNavState('/'+ subItem.path)"
            >
              <template slot="title">
                <i class="el-icon-menu"></i>
                <span>{{ subItem.authName }}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <el-container>
        <el-main>
          <router-view></router-view>
        </el-main>
      </el-container>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data() {
    return {
      menuList: [],
      iconList: {
        125: 'el-icon-user',
        103: 'el-icon-lock',
        101: 'el-icon-shopping-bag-1',
        102: 'el-icon-shopping-cart-full',
        145: 'el-icon-data-analysis',
      },
      isCollapse: false,
      /// 激活的菜单地址
      activePath: ''
    }
  },
  created() {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    quit() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    async getMenuList() {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menuList = res.data
    },
    toggleCollapse() {
      this.isCollapse = !this.isCollapse
    },
    /// 保存链接的激活状态
    saveNavState(path) {
      window.sessionStorage.setItem('activePath', path)
      this.activePath = path
    }
  },
}
</script>

<style Lang='less' scoped>
.home-container {
  height: 100%;
}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #ffff;
  font-size: 22px;
  > div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
}

.el-aside {
  background-color: #333744;
  transition: width 0.5s;
}
.el-menu {
  border-right: none;
}
.el-main {
  background-color: #eaedf1;
}
.toggle-btn {
  background-color: #4a5064;
  font-size: 12px;
  line-height: 24px;
  text-align: center;
  color: #ffff;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
